/* gcc -g -Wall virtctl.c -o virtctl -lvirt *//* virtctl guest-name start/shutdown/status */#include #include #include #include #include static int set_start(char *guestname);static int set_shutdown(char *guestname);static int get_status(char *guestname);static virConnectPtr conn = NULL;static virDomainPtr dom = NULL;int main(int argc, char *argv[]){ if (argc != 3) { fprintf(stderr, "Usage:./virtctl guest-name start/shutdown/status\n"); return -1; } conn = virConnectOpen("qemu:///system"); if (conn == NULL) { fprintf(stderr, "Failed to open connection to qemu:///system\n"); return -1; } dom = virDomainLookupByName(conn, argv[1]); if (dom == NULL) { fprintf(stderr, "virDomainLookupByName failed!\n"); virConnectClose(conn); return -1; } if (strcmp(argv[2], "start") == 0 || strcmp(argv[2], "START") == 0) { if (set_start(argv[1]) != 0) { fprintf(stderr, "start failed!\n"); virDomainFree(dom); //virConnectClose(conn); return -1; } } if (strcmp(argv[2], "shutdown") == 0 || strcmp(argv[2], "SHUTDOWN") == 0) { if (set_shutdown(argv[1]) != 0) { fprintf(stderr, "shutdown failed!\n"); virConnectClose(conn); virDomainFree(dom); return -1; } } if (strcmp(argv[2], "status") == 0 || strcmp(argv[2], "STATUS") == 0) { if (get_status(argv[1]) != 0) { fprintf(stderr, "get status failed!\n"); virDomainFree(dom); virConnectClose(conn); return -1; } } if (dom != NULL) virDomainFree(dom); if (conn != NULL) virConnectClose(conn); return 0;}int set_start(char *guestname){ int flag = -1; // 启动已定义虚拟机 flag = virDomainCreate(dom); if (flag != 0) { virErrorPtr error = virGetLastError(); fprintf(stderr, "virDomainCreate failed:%s!\n", error->message); virFreeError(error); return -1; } return 0;}int set_shutdown(char *guestname){ int flag = -1; // 关闭已定义虚拟机 flag = virDomainShutdown(dom); if(flag != 0) { virErrorPtr error = virGetLastError(); fprintf(stderr, "virDomainShutdown failed:%s!\n", error->message); virFreeError(error); return -1; } return 0;}int get_status(char *guestname){ char *status = NULL; virErrorPtr error = NULL; int vcpus = 0; unsigned long long node_free_memory = 0; int id = 0; const char *name = NULL; virNodeInfo nodeinfo; virDomainInfo info; // 获取虚拟机状态 fprintf(stdout, "****************************************************\n"); /* get the capabilities of conn*/ status = virConnectGetCapabilities(conn); if (status == NULL) { error = virGetLastError(); fprintf(stderr, "virConnectGetCapabilities failed: %s\n", error->message); virFreeError(error); return -1; } //fprintf(stdout, "Capabilities of connection:\n%s\n", status); free(status); status = NULL; /* get the hostname reported from conn*/ status = virConnectGetHostname(conn); if (status == NULL) { error = virGetLastError(); fprintf(stderr, "virConnectGetHostname failed: %s\n", error->message); virFreeError(error); return -1; } //fprintf(stdout, "------------------------------------------\n"); fprintf(stdout, "Connection hostname:\t%s\n", status); free(status); status = NULL; /* get the maximum number of vcpus supported by conn3 */ vcpus = virConnectGetMaxVcpus(conn, NULL); if (vcpus < 0) { error = virGetLastError(); fprintf(stderr, "virConnectGetMaxVcpus failed: %s\n", error->message); virFreeError(error); return -1; } fprintf(stdout, "Maximum number of cpus supported on connection:\t%d\n", vcpus); /* get the amount of free memory available on the node from conn4 */ node_free_memory = virNodeGetFreeMemory(conn); if (node_free_memory == 0) { error = virGetLastError(); fprintf(stderr, "virNodeGetFreeMemory failed: %s\n", error->message); virFreeError(error); return -1; } fprintf(stdout, "Node free memory:\t%llu\n", node_free_memory); /* get the node information from conn*/ if (virNodeGetInfo(conn, &nodeinfo) < 0) { error = virGetLastError(); fprintf(stderr, "virNodeGetInfo failed: %s\n", error->message); virFreeError(error); return -1; } fprintf(stdout, "------------------------------------------\n"); fprintf(stdout, "Node information from connection\n"); fprintf(stdout, "Model:\t%s\n", nodeinfo.model); fprintf(stdout, "Memory size:\t%lukb\n", nodeinfo.memory); fprintf(stdout, "Number of CPUs:\t%u\n", nodeinfo.cpus); fprintf(stdout, "MHz of CPUs:\t%u\n", nodeinfo.mhz); fprintf(stdout, "Number of NUMA nodes:\t%u\n", nodeinfo.nodes); fprintf(stdout, "Number of CPU sockets:\t%u\n", nodeinfo.sockets); fprintf(stdout, "Number of CPU cores per socket:\t%u\n", nodeinfo.cores); fprintf(stdout, "Number of CPU threads per core:\t%u\n", nodeinfo.threads); fprintf(stdout, "****************************************************\n"); fprintf(stdout, "id\t名称\t\t状态\n"); fprintf(stdout, "------------------------------------------\n"); id = virDomainGetID(dom); name = virDomainGetName(dom); if (virDomainGetInfo(dom, &info) < 0) { error = virGetLastError(); fprintf(stderr, "virDomainGetInfo failed: %s\n", error->message); virFreeError(error); return -1; } fprintf(stdout, "%d\t%s\t\t%d\n", id, name, info.state); fprintf(stdout, "****************************************************\n"); return 0;}
（2）编译运行
#gcc -g -Wall virtctl.c -o virtctl -lvirt
#./virtctl newlinux status
****************************************************Connection hostname: localhost.localdomainMaximum number of cpus supported on connection: 16Node free memory: 1381175296------------------------------------------Node information from connectionModel: x86_64Memory size: 3823996kbNumber of CPUs: 4MHz of CPUs: 3200Number of NUMA nodes: 1Number of CPU sockets: 1Number of CPU cores per socket: 2Number of CPU threads per core: 2****************************************************id 名称 状态------------------------------------------8 newlinux 1****************************************************
attach-device 从一个XML文件附加装置 attach-disk 附加磁盘设备 attach-interface 获得网络界面 autostart 自动开始一个域 capabilities 性能 cd change the current directory connect 连接（重新连接）到 hypervisor console 连接到客户会话 cpu-baseline compute baseline CPU cpu-compare compare host CPU with a CPU described by an XML file create 从一个 XML 文件创建一个域 start 开始一个（以前定义的）非活跃的域 destroy 删除一个域 detach-device 从一个 XML 文件分离设备 detach-disk 分离磁盘设备 detach-interface 分离网络界面 define 从一个 XML 文件定义（但不开始）一个域 domid 把一个域名或 UUID 转换为域 id domuuid 把一个域名或 id 转换为域 UUID dominfo 域信息 domjobinfo domain job information domjobabort abort active domain job domname 将域 id 或 UUID 转换为域名 domstate 域状态 domblkstat 获得域设备块状态 domifstat 获得域网络接口状态 dommemstat get memory statistics for a domain domblkinfo domain block device size information domxml-from-native Convert native config to domain XML domxml-to-native Convert domain XML to native config dumpxml XML 中的域信息 edit 编辑某个域的 XML 配置 find-storage-pool-sources 发现潜在存储池源 find-storage-pool-sources-as 找到潜在存储池源 freecell NUMA可用内存 hostname 打印管理程序主机名 list 列出域 migrate 将域迁移到另一个主机中 migrate-setmaxdowntime set maximum tolerable downtime net-autostart 自动开始网络 net-create 从一个 XML 文件创建一个网络 net-define 从一个 XML 文件定义(但不开始)一个网络 net-destroy 删除一个网络 net-dumpxml XML 中的网络信息 net-edit 为网络编辑 XML 配置 net-list 列出网络 net-name 把一个网络UUID 转换为网络名 net-start 开始一个(以前定义的)不活跃的网络 net-undefine 取消定义一个非活跃的网络 net-uuid 把一个网络名转换为网络UUID iface-list list physical host interfaces iface-name convert an interface MAC address to interface name iface-mac convert an interface name to interface MAC address iface-dumpxml interface information in XML iface-define define (but don't start) a physical host interface from an XML file iface-undefine undefine a physical host interface (remove it from configuration) iface-edit edit XML configuration for a physical host interface iface-start start a physical host interface (enable it / "if-up") iface-destroy destroy a physical host interface (disable it / "if-down") managedsave managed save of a domain state nodeinfo 节点信息 nodedev-list 这台主机中中的枚举设备 nodedev-dumpxml XML 中的节点设备详情 nodedev-dettach dettach node device from its device driver nodedev-reattach reattach node device to its device driver nodedev-reset 重置节点设备 nodedev-create create a device defined by an XML file on the node nodedev-destroy destroy a device on the node nwfilter-define define or update a network filter from an XML file nwfilter-undefine undefine a network filter nwfilter-dumpxml network filter information in XML nwfilter-list list network filters nwfilter-edit edit XML configuration for a network filter pool-autostart 自动启动某个池 pool-build 建立池 pool-create 从一个 XML 文件中创建一个池 pool-create-as 从一组变量中创建一个池 pool-define 在一个 XML 文件中定义（但不启动）一个池 pool-define-as 在一组变量中定义池 pool-destroy 销毁池 pool-delete 删除池 pool-dumpxml XML 中的池信息 pool-edit 为存储池编辑 XML 配置 pool-info 存储池信息 pool-list 列出池 pool-name 将池 UUID 转换为池名称 pool-refresh 刷新池 pool-start 启动一个（以前定义的）非活跃的池 pool-undefine 取消定义一个不活跃的池 pool-uuid 把一个池名称转换为池 UUID secret-define define or modify a secret from an XML file secret-dumpxml secret attributes in XML secret-set-value set a secret value secret-get-value Output a secret value secret-undefine undefine a secret secret-list list secrets pwd print the current directory quit 退出这个非交互式终端 exit 退出这个非交互式终端 reboot 重新启动一个域 restore 从一个存在一个文件中的状态恢复一个域 resume 重新恢复一个域 save 把一个域的状态保存到一个文件 schedinfo 显示/设置日程安排变量 dump 把一个域的内核 dump 到一个文件中以方便分析 shutdown 关闭一个域 setmem 改变内存的分配 setmaxmem 改变最大内存限制值 setvcpus 改变虚拟 CPU 的号 suspend 挂起一个域 ttyconsole tty 控制台 undefine 取消定义一个非活跃的域 update-device update device from an XML file uri 打印管理程序典型的URI vol-create 从一个 XML 文件创建一个卷 vol-create-from create a vol, using another volume as input vol-create-as 从一组变量中创建卷 vol-clone clone a volume. vol-delete 删除卷 vol-wipe wipe a vol vol-dumpxml XML 中的卷信息 vol-info 存储卷信息 vol-list 列出卷 vol-pool returns the storage pool for a given volume key or path vol-path returns the volume path for a given volume name or key vol-name returns the volume name for a given volume key or path vol-key returns the volume key for a given volume name or path vcpuinfo 域 vcpu 的信息 vcpupin 控制域 vcpu affinity version 显示版本 vncdisplay vnc 显示 snapshot-create Create a snapshot snapshot-current Get the current snapshot snapshot-delete Delete a domain snapshot snapshot-dumpxml Dump XML for a domain snapshot snapshot-list List snapshots for a domain snapshot-revert Revert a domain to a snapshot 其中总结常用的命令：
